Using street view, you can often see "Social Security" on a building or sign.

Social Security Office Directions and Notes :

THE OFFICE IS ON THE FIRST FLOOR OF THE BUILDING ON 7TH STREET BETWEEN KING AND CASS STREETS (NEXT TO PIZZA DOCTORS).

La Crosse Social Security Office Notes

Hours of Social Security offices were reduced in November, 2012.
Almost all Social Security offices in the continental US have hours
of 9:00 to noon on Wednesdays, and 9:00 to 3:00 on other weekdays.
See if you can get an appointment by phone. Fridays may be less
crowded. You can do things like signup for Medicare
online at ssa.gov.